/*
 * Copyright (C) 2003, 2009, 2012 Apple Inc. All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 *
 * THIS SOFTWARE IS PROVIDED BY APPLE INC. ``AS IS'' AND ANY
 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
 * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL APPLE COMPUTER, INC. OR
 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
 * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */

#ifndef SKY_ENGINE_CORE_RENDERING_CLIPRECTS_H_
#define SKY_ENGINE_CORE_RENDERING_CLIPRECTS_H_

#include "flutter/sky/engine/core/rendering/ClipRect.h"

namespace blink {

class ClipRects {
  WTF_MAKE_FAST_ALLOCATED;

 public:
  static PassRefPtr<ClipRects> create() { return adoptRef(new ClipRects); }

  static PassRefPtr<ClipRects> create(const ClipRects& other) {
    return adoptRef(new ClipRects(other));
  }

  ClipRects() : m_refCnt(1), m_fixed(0) {}

  void reset(const LayoutRect& r) {
    m_overflowClipRect = r;
    m_posClipRect = r;
    m_fixed = 0;
  }

  const ClipRect& overflowClipRect() const { return m_overflowClipRect; }
  void setOverflowClipRect(const ClipRect& r) { m_overflowClipRect = r; }

  const ClipRect& posClipRect() const { return m_posClipRect; }
  void setPosClipRect(const ClipRect& r) { m_posClipRect = r; }

  bool fixed() const { return static_cast<bool>(m_fixed); }
  void setFixed(bool fixed) { m_fixed = fixed ? 1 : 0; }

  void ref() { m_refCnt++; }
  void deref() {
    if (!--m_refCnt)
      delete this;
  }

  bool operator==(const ClipRects& other) const {
    return m_overflowClipRect == other.overflowClipRect() &&
           m_posClipRect == other.posClipRect() && fixed() == other.fixed();
  }

  ClipRects& operator=(const ClipRects& other) {
    m_overflowClipRect = other.overflowClipRect();
    m_posClipRect = other.posClipRect();
    m_fixed = other.fixed();
    return *this;
  }

 private:
  ClipRects(const LayoutRect& r)
      : m_overflowClipRect(r), m_posClipRect(r), m_refCnt(1), m_fixed(0) {}

  ClipRects(const ClipRects& other)
      : m_overflowClipRect(other.overflowClipRect()),
        m_posClipRect(other.posClipRect()),
        m_refCnt(1),
        m_fixed(other.fixed()) {}

  ClipRect m_overflowClipRect;
  ClipRect m_posClipRect;
  unsigned m_refCnt : 31;
  unsigned m_fixed : 1;
};

}  // namespace blink

#endif  // SKY_ENGINE_CORE_RENDERING_CLIPRECTS_H_
